{"id":"SMiy2Ecw","uri":"https://rocdata.global/USA/standardnodes/SMiy2Ecw","jurisdiction":"https://rocdata.global/USA","document":"https://rocdata.global/USA/documents/DayhBeyn","parent":"https://rocdata.global/USA/standardnodes/S76ctUeA","kind":null,"subjects":[],"education_levels":[],"concept_terms":[],"children":[],"sort_order":5.0,"notation":"CCSS.Math.Content.2.NBT.B.9","list_id":"","title":"","description":"Explain why addition and subtraction strategies work, using place value and the properties of operations.","language":null,"concept_keywords":null,"path":null,"canonical_uri":null,"source_uri":null,"source_id":"104","notes":"","date_created":"2020-12-17T17:26:55.382042Z","date_modified":"2020-12-17T17:26:55.382071Z","extra_fields":{},"level":4}